Swing check valve brass seat flanged check valve double flange di disc Specification: 1. Working Medium: Water or Slotion of Glycol; 2. Working Temperature: 0℃ to 120℃; 3. Norminal Pressure: PN10 PN25 PN16 Bar; 4. Thread: According to ISO228-1; 5. Avaialble Size: 1/2" to 2"(Caliber); 6. Size of Test Point: 1/4"F. Installation: Place and direction to install. Either water return pipeline or water supply line is allowed to have a balancing valve on and only one valve is enough in ev